There is general agreement on peripheral factors of muscle fatigue that develop within the muscle and impair muscle fiber contractile mechanisms and muscle performance. Central factors of muscle fatigue that arise within the central nervous system have also been suggested to influence muscle force during fatigue. However, no direct empirical evidence of their influence on muscle force capacity ...

The ability to quantitatively assess grasp performance is essential both in off-line planning of grasps for robotic manipulation as in evaluating on-line executed grasps. Until now most existing metrics rely on force-closure tests that are limited in scope. We propose a grasp quality metric that provides sensible performance criteria even in non-force-closure grasps. It is based in two improvem...

analytics and optimization M. Baier J. E. Carballo A. J. Chang Y. Lu A. Mojsilović M. J. Richard M. Singh M. S. Squillante K. R. Varshney We describe a quantitative analytics and optimization methodology designed to improve the efficiency and productivity of the IBM global sales force. This methodology is implemented and deployed via three company-wide initiatives, namely the Growth and Perform...

In this paper, we consider an optimization of grasping by using a required external force set. By using the set, we can not only deal with whatever a desired grasp is, such as force closure or equilibrium grasp, but also evaluate the magnitudes of the resistible external forces and moments. Then, we define an optimization problem from the viewpoint of decreasing the magnitudes of the contact fo...

chaetomorpha sp is one of the persian gulf green algae which can be a marine source of natural antioxidants such as polyphenols. industrial and economic development of these materials is influenced by effective extraction and application methods. microwave-assisted extraction (mae) and ultrasound-assisted extraction (uae) are novel techniques which have a potential to apply in laboratory with a...

This paper investigates the development of weld zone in Resistance Spot Welding (RSW) which focuses on weld nugget and Heat Affected Zone (HAZ). The effects of four factors namely weld current, weld time, electrode force and hold time were studied using a general 2 factorial design augmented by five centre points. The results of the analysis showed that all selected factors except hold time exh...

This paper presents method for muscular force evaluation in shoulder joint based on optimization criteria of muscle force distribution. Multibody model of anatomical system was built with an assumption that skeletal system consists of rigid bodies. However, static and dynamic characteristics have been taken into account in the muscle description. This model was used to calculate the value of jo...

The concept, issues of implementation and file formats of the GRadient-based Optimization Workflow for the Automated Development of Molecular Models ’GROW’ (version 1.0) software tool are described. It enables users to perform automated optimizations of force field parameters for atomistic molecular simulations by an iterative, gradient-based optimization workflow. The modularly constructed too...

A general computational model of the human lumbar spine and trunkmuscles including optimization formulations was provided. For a given condition, the trunk muscle forces could be predicted considering the human physiology including the follower load concept. The feasibility of the solution could be indirectly validated by comparing the compressive force, the shear force, and the joint moment. T...

This paper describes the development of a novel humanoid robot foot/ankle based on an orientation Parallel Kinematic Mechanism for intelligent and flexible control. With three identical Universal-Prismatic-Spherical prismatic-actuated limbs and a central Universal-Revolute passive limb, the PKM can perform three degrees of freedom rotation motions. In order to enable the humanoid robot safely t...